Patents Assigned to Kali und Salz Beteiligungs AG
  • Process for the treatment of langbeinite and anhydrite containing kieserite concentrates
    Patent number: 5562755
    Abstract: A process for after-purifying a kieserite mixture pre-concentrated electrostatically across a number of stages is characterized in that the outside air used in the after purification stage is adjusted by dehumidification in a conventional dehumidification plant to an absolute moisture of 4.5 g/m.sup.3, and the kieserite mixture to be separated by triboelectrically charging with said air at a temperature of below 40.degree. C.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: October 8, 1996
    Assignee: Kali und Salz Beteiligungs AG
    Inventors: G unter Fricke, Ingo Stahl, Peter-M. Beier
  • Process and apparatus for preparing a potassium chloride mixture
    Patent number: 5503641
    Abstract: A potassium chloride mixture with grains of different sizes is extracted in a first stage with an unsaturated solution at an elevated temperature, whereby the finest grains are completely dissolved and the coarse proportions are caused to start dissolution, the purified medium fraction is transported into a second process stage and the previously dissolved amount of KCl is crystallized there onto the purified grains at a lower temperature, forming a product of high purity with a balanced grain size and a narrow grain spectrum.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: April 2, 1996
    Assignee: Kali und Salz Beteiligungs AG
    Inventors: Ivan Bakardjiev, Hans W. Beher, Ingo Stahl